| Name | Description | 
|---|
  erfSimple | Error function (simple implementation, precision around 1e-7) | 
  cdfInvNormal | Quantile (inverse cumulative distribution function) of the normal distribution with a precision of about 1e-9 | 
  erfInvSimple | Inverse error function with a precision of about 1e-7 | 
  quantileNormalSimple | Test quantile of normal distribution with reduced precision | 
  derOneSided | Return approximation of derivative by a one-sided difference quotient (if size(u,1)=1, zero is returned) | 
  derTwoSided | Return approximation of derivative by a two-sided difference quotient (if size(u,1)=1, zero is returned) |